This is a guide on how to center an image, object, text etc and on how to align centers on your layers.
More Photoshop tutorials:
► How to delete the background: http://bit.ly/2FLXyuH
► How to blend images: http://bit.ly/2Iyjfw9
► How to merge layers: http://bit.ly/2GDDvM5
► How to make a transparent background: http://bit.ly/2DCfaTY